A potential tunnel entrance

I discovered a potential entrance to a tunnel in the rear garden of 22 College Street.

I disclosed the location to someone in a phone call; shortly afterwards the site was cleared.

This video shows the garden before and after it was cleared.

The Area cleared

The photo shows a section of wall loosely filled with bricks. This is the area where I thought there was some form of entrance.

Loose bricks in a rear wall.